Jane Street Software Engineer Interview Questions India 2026

Jane Street technical interview FAQ

01What is the recruitment process at Jane Street?

The typical Jane Street recruitment process has 6 stages: Resume or campus screen: targets top IITs, NITs, and competitive programming candidates → Online Assessment or phone screen: 1 to 2 hard algorithmic problems, 60 minutes → Technical Interview 1: Hard problem-solving with live thinking and iterative refinement → Technical Interview 2: A second hard problem, sometimes probability or combinatorics → Technical Interview 3 (on-site or virtual): Third problem, often the most open-ended → Offer or debrief: Decision is collective across all interviewers.

02What are the interview rounds at Jane Street?

Jane Street typically conducts 4 interview rounds: Online Assessment or Phone Screen (60 min): 1 to 2 hard problems. They evaluate how you think aloud, not just whether you reach the answer.; Technical Interview 1 (60 min): A hard algorithmic or mathematical problem. Interviewers expect you to explore wrong approaches openly and correct course collaboratively.; Technical Interview 2 (60 min): May involve probability, combinatorics, or dynamic programming. Functional programming fluency is a significant advantage here.; Technical Interview 3 (60 min): The most open-ended round. Problems are often novel and require building intuition from scratch during the session..

03What framework should I use for Jane Street technical interviews?

HireStepX recommends the First-principles decomposition framework for this type of interview: Break every problem into its smallest mathematical invariant first, then build up a solution incrementally with the interviewer before writing a single line of code.

04Reverse a linked list in O(1) extra space. Then explain when you'd use this in production.

To answer this question well, HireStepX recommends the First-principles decomposition approach: Break every problem into its smallest mathematical invariant first, then build up a solution incrementally with the interviewer before writing a single line of code. Ground your answer in a specific real example from your own experience.

05What is the difference between a class and an object? Give an example.

To answer this question well, HireStepX recommends the First-principles decomposition approach: Break every problem into its smallest mathematical invariant first, then build up a solution incrementally with the interviewer before writing a single line of code. Ground your answer in a specific real example from your own experience.

06Write a SQL query to find the second-highest salary in a department.

To answer this question well, HireStepX recommends the First-principles decomposition approach: Break every problem into its smallest mathematical invariant first, then build up a solution incrementally with the interviewer before writing a single line of code. Ground your answer in a specific real example from your own experience.

07What is normalisation in databases? When would you de-normalise?

To answer this question well, HireStepX recommends the First-principles decomposition approach: Break every problem into its smallest mathematical invariant first, then build up a solution incrementally with the interviewer before writing a single line of code. Ground your answer in a specific real example from your own experience.

08What's the difference between a stack and a queue? Give a real-world use case for each.

To answer this question well, HireStepX recommends the First-principles decomposition approach: Break every problem into its smallest mathematical invariant first, then build up a solution incrementally with the interviewer before writing a single line of code. Ground your answer in a specific real example from your own experience.